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BIO 160 > Chapter 26 > Flashcards

Chapter 26 Flashcards

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1
Q

__________ are short term regulators of appetite, whereas __________ is a long-term regulator.
A. Insulin and cholecystokinin (CCK); peptide YY (PYY)
B. Peptide YY (PYY) and insulin; cholecystokinin (CCK)
C. Peptide YY (PYY) and cholecystokinin (CCK); insulin
D. Leptin and insulin; cholecystokinin (CCK)
E. Leptin and insulin; peptide YY (PYY)

A

C. Peptide YY (PYY) and cholecystokinin (CCK); insulin

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2
Q

Which of the following are macronutrients?
A. Sodium, potassium, calcium, chloride, and phosphorous
B. Nucleic acids, carbohydrates, lipids, and proteins
C. Sodium, potassium, carbohydrates, lipids, and proteins
D. Carbohydrates, lipids, proteins, and water
E. Carbohydrates, lipids, and proteins, but not water

A

D. Carbohydrates, lipids, proteins, and water

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3
Q 
\_\_\_\_\_\_\_\_\_\_ yield about 4 kcal/g when completely oxidized, whereas \_\_\_\_\_\_\_\_\_\_ yield about 9 kcal/g.  
A.  Proteins and carbohydrates; fats 
B.  Proteins; fats and carbohydrates 
C.  Fats; carbohydrates and proteins 
D.  Carbohydrates; fats and proteins 
E.  Carbohydrates and fats; proteins
A

A. Proteins and carbohydrates; fats

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4
Q 
Where are most carbohydrates in the body found?  
A.  Adipose tissue 
B.  Muscle glycogen 
C.  Blood glucose 
D.  Liver glycogen 
E.  Pancreas glucose
A

B. Muscle glycogen

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5
Q 
Carbohydrates function as structural components in all of the following except \_\_\_\_\_\_\_\_\_\_.  
A.  glycolipids 
B.  glycoproteins 
C.  nucleic acids 
D.  amino acids 
E.  ATP
A

D. amino acids

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6
Q

Which of the following is not a function of lipids?
A. They form the plasma membrane structure.
B. They form myelin around nerve fibers.
C. They form the structure of some hormones.
D. They provide cushioning around soft organs.
E. They form skeletal muscle fibers.

A

E. They form skeletal muscle fibers.

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7
Q 
Which of the following constitutes the so-called "bad cholesterol?"  
A.  Triglycerides 
B.  Chylomicrons 
C.  Low-density lipoproteins 
D.  High-density lipoproteins 
E.  Very-low-density lipoproteins
A

C. Low-density lipoproteins

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8
Q 
Which of the following is the healthiest ratio of triglycerides?  
A.  High HDL: low LDL 
B.  High LDL: low HDL 
C.  High LDL: low chylomicron 
D.  High SFA: low HDL 
E.  High chylomicron: low LDL
A

A. High HDL: low LDL

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9
Q 
Where does HDL in the body come from?  
A.  The diet 
B.  The liver 
C.  The pancreas 
D.  The small intestine 
E.  The gallbladder
A

B. The liver

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10
Q

Which of the following is not a function of proteins in the body?
A. Muscle contraction
B. Transport of blood lipids
C. Maintaining blood viscosity and osmolarity
D. Catalyzing enzymatic reactions
E. Serving as cofactors for enzymes

A

E. Serving as cofactors for enzymes

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11
Q 
Where is most protein in the body found?  
A.  In the skeletal system 
B.  In the muscular system 
C.  In the the cardiovascular system 
D.  In the integumentary system 
E.  In the lymphatic system
A

B. In the muscular system

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12
Q 
Who would you expect to be in a state of negative nitrogen balance?  
A.  A growing child 
B.  A pregnant woman 
C.  A weightlifter 
D.  A patient with muscle atrophy 
E.  A sprinter
A

D. A patient with muscle atrophy

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13
Q 
High-quality \_\_\_\_\_\_\_\_\_\_ proteins are those that provide all the essential amino acids.  
A.  globular 
B.  fibrous 
C.  net 
D.  incomplete 
E.  complete
A

E. complete

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14
Q 
Which vitamin deficiency is the most common worldwide?  
A.  Vitamin A 
B.  Vitamin B6 (pyridoxine) 
C.  Vitamin C 
D.  Vitamin D 
E.  Vitamin E
A

A. Vitamin A

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15
Q

Minerals are __________, whereas vitamins are __________.
A. micronutrients; macronutrients
B. water-soluble elements; lipid-soluble compounds
C. inorganic elements; organic compounds
D. inessential nutrients; essential nutrients
E. incomplete nutrients; complete nutrients

A

C. inorganic elements; organic compounds

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16
Q 
Which of the following represents the overall reaction for aerobic respiration?  
A.  C6H12O6 + 6 H2O  6 CO2 + 6 O2 
B.  C6H12O6 + 6 O2  6 CO2 + 6 H2O 
C.  C6H12O6 + 6 CO2  6 O2 + 6 H2O 
D.  6 CO2 + 6 H2O  C6H12O6 + 6 O2 
E.  6 O2+ 6 H2O  C6H12O6 + 6 CO2
A

B. C6H12O6 + 6 O2  6 CO2 + 6 H2O

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17
Q 
Which of the following is a product of glycolysis?  
A.  Glucose 
B.  Carbon dioxide 
C.  Lactic acid 
D.  Pyruvic acid 
E.  Acetyl-CoA
A

D. Pyruvic acid

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18
Q 
Which of these processes is essential for all of the rest to happen?  
A.  Glycolysis 
B.  Citric acid cycle 
C.  Lactic acid reduction 
D.  Electron transport chain 
E.  Anaerobic fermentation
A

A. Glycolysis

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19
Q

__________ happens in the cytoplasm, whereas __________ happens in the mitochondrion.
A. The citric acid (Krebs) cycle; mitochondrial electron-transport
B. Aerobic respiration; anaerobic fermentation
C. Glycolysis; the citric acid (Krebs) cycle
D. Anaerobic fermentation; glycolysis
E. Glycolysis; pyruvic acid reduction

A

C. Glycolysis; the citric acid (Krebs) cycle

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20
Q

Which of the following is true concerning oxygen in regards to aerobic respiration?
A. It transports electrons to the mitochondrion.
B. It directly transfers electrons and protons to NAD+ and FAD.
C. It directly receives electrons and protons from NAD+ and FAD.
D. It is the only substrate of aerobic respiration.
E. It is the final electron acceptor in aerobic respiration.

A

E. It is the final electron acceptor in aerobic respiration.

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21
Q 
What is the synthesis of glucose from amino acids called?  
A.  Glycogenesis 
B.  Glycogenolysis 
C.  Glycolysis 
D.  Gluconeogenesis 
E.  Glycogen catabolism
A

D. Gluconeogenesis

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22
Q 
Which of the following is a final product of aerobic respiration?  
A.  Carbon dioxide 
B.  Pyruvic acid 
C.  Lactic acid 
D.  Glucose 
E.  Oxygen
A

A. Carbon dioxide

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23
Q 
What process produces most of the NADH that contributes to ATP synthesis in the cell?  
A.  Glycolysis 
B.  The citric acid cycle 
C.  Anaerobic fermentation 
D.  The mitochondrial proton pumps 
E.  The electron transfer from FADH2
A

B. The citric acid cycle

24
Q

Glycolysis and aerobic respiration collectively produce up to ____________ ATP per glucose, whereas anaerobic fermentation produces __________.
A. 2; about the same, varying from one tissue to another
B. 32; none
C. 32; 2
D. 32; 36
E. 36; about the same, varying from one tissue to another

A

C. 32; 2

25
Q 
Which of the following compounds yields the most ATP per molecule?  
A.  Glucose 
B.  Pyruvic acid 
C.  Acetyl-CoA 
D.  Lactic acid 
E.  Glycogen
A

E. Glycogen

26
Q

The inner membrane of a mitochondrion contains the protein __________, which harnesses the energy created by H+ flow to produce ATP by a process called __________.
A. enzyme complex; reduction
B. ATP synthase; oxidation
C. enzyme complex; proton pumping
D. ATP synthase; the chemiosmotic mechanism
E. cytochrome c; reduction

A

D. ATP synthase; the chemiosmotic mechanism

27
Q 
Most of the fat in the body is stored in what form? 
A. LDL
B. HDL
C. Cholesterol
D. Triglycerides
E. Fatty acids
A

D. Triglycerides

28
Q 
Fatty acids are catabolized through which process? 
A. Beta oxidation
B. Ketogenesis
C. Lipogenesis
D. Lipolysis
E. The fat-sparing effect
A

A. Beta oxidation

29
Q 
Incomplete fatty acid oxidation produces \_\_\_\_\_\_\_\_\_\_, which might lead to \_\_\_\_\_\_\_\_\_\_. 
A. triglycerides; new triglycerides
B. ketone bodies; acidosis
C. pyruvic acid; acidosis
D. glycerol; alkalosis
E. acetyl-CoA; acidosis
A

B. ketone bodies; acidosis

30
Q 
How much ATP can oxidation of a 16 carbon atom fatty acid yield?  
A.  2 ATP 
B.  18 ATP 
C.  36 ATP 
D.  38 ATP 
E.  129 ATP
A

E. 129 ATP

31
Q 
Where does the highest rate of tissue protein turnover occur?  
A.  The intestinal mucosa 
B.  The gastric mucosa 
C.  The hepatic sinusoids 
D.  The splenic sinusoids 
E.  The pancreatic islets
A

A. The intestinal mucosa

32
Q 
The first step in using amino acids as fuel is to \_\_\_\_\_\_\_\_\_\_ them.  
A.  digest 
B.  deaminate 
C.  transaminate 
D.  aminate 
E.  synthesize
A

B. deaminate

33
Q 
Which of the following is not a function of the liver?  
A.  Glycogenesis 
B.  Detoxification 
C.  Phagocytosis 
D.  Secretion of digestive enzymes 
E.  Synthesis of plasma proteins
A

D. Secretion of digestive enzymes

34
Q

Which metabolic process produces ammonia?
A. Beta oxidation of -ketoglutaric acid
B. Lipolysis
C. Transamination of urea
D. Amination of keto acids
E. Deamination of glutamic acid

A

E. Deamination of glutamic acid

35
Q

The liver performs all of the following functions except __________.
A. converting ammonia to urea
B. carrying out most beta oxidation
C. producing insulin and glucagon
D. synthesizing cholesterol
E. synthesizing glucose from fats and amino acids

A

C. producing insulin and glucagon

36
Q

Which of the following occurs during the postabsorptive state?
A. Blood glucose rises
B. Glycerol is used for gluconeogenesis
C. Lipids are stored in adipose tissue
D. Glucose is stored by glycogenesis
E. Protein synthesis is active

A

B. Glycerol is used for gluconeogenesis

37
Q 
Which of the following occurs during the absorptive state?  
A.  Glucagon levels increase 
B.  Blood glucose falls 
C.  Fatty acids are oxidized for fuel 
D.  Lipolysis is occurring 
E.  Gluconeogenesis is suppressed
A

E. Gluconeogenesis is suppressed

38
Q 
Which of the following is secreted during the postabsorptive state?  
A.  Gastrin 
B.  Insulin 
C.  Growth hormone 
D.  Cholecystokinin 
E.  Secretin
A

C. Growth hormone

39
Q 
Which of the following does not raise the total metabolic rate?  
A.  Starvation 
B.  Anxiety 
C.  Fever 
D.  Eating a big meal 
E.  Pregnancy
A

A. Starvation

40
Q

When should the basal metabolic rate be measured?
A. When a person is sleeping
B. When a person first rises in the morning
C. When a person has just eaten a meal of no more than 2000 kcal
D. When a person is in the absorptive state
E. When a person is engaged in normal physical activity but not strenuous exercise

A

B. When a person first rises in the morning

41
Q

Which of the following does not explain why people on weight-loss diets often lose weight quickly at first, but then more slowly over time?
A. Water is lost quickly but other weight is harder to lose.
B. The initial weight loss is mostly fat.
C. As a diet progresses, the body produces more fat even with the same caloric intake.
D. The body lowers its metabolic rate when it loses weight.
E. Will power often weakens as the diet progresses.

A

B. The initial weight loss is mostly fat.

42
Q 
Fats should account for about \_\_\_\_\_\_\_\_\_\_ percent of the daily caloric intake.  
A.  5 
B.  10 
C.  30 
D.  60 
E.  80
A

C. 30

43
Q

Glycogenesis is stimulated by __________, whereas glycogenolysis is stimulated by __________.
A. insulin; glucagon and epinephrine
B. insulin; aldosterone
C. growth hormone; glucagon and epinephrine
D. growth hormone; cortisol
E. growth hormone; insulin

A

A. insulin; glucagon and epinephrine

44
Q 
Approximately what percentage of the energy in a glucose molecule winds up in ATP with the rest lost as body heat? 
A. 10
B. 20
C. 40
D. 80
E. 98
A

C. 40

45
Q

During periods of fasting, why is fat said to have a protein-sparing effect?
A. The body oxidizes its spare protein before it depletes its fat reserves.
B. The body metabolizes fats and proteins through the same metabolic pathways.
C. The body must have an adequate fat intake in order to absorb and metabolize proteins.
D. The body must have an adequate protein intake in order to absorb and metabolize fats.
E. The body does not oxidize its proteins unless it has consumed its fat reserves first.

A

E. The body does not oxidize its proteins unless it has consumed its fat reserves first.

46
Q 
A nude body at a room temperature of 21C (70F) loses most of its heat by which process?  
A.  Evaporation 
B.  Conduction 
C.  Convection 
D.  Radiation 
E.  Forced convection
A

D. Radiation

47
Q 
Which of the following enhances loss of body heat by conduction?  
A.  Radiation 
B.  Evaporation 
C.  Nonshivering thermogenesis 
D.  Shivering thermogenesis 
E.  Convection
A

E. Convection

48
Q 
What is the quickest physiological mechanism for achieving moderate heat loss?  
A.  Convection 
B.  Cutaneous vasoconstriction 
C.  Nonshivering thermogenesis 
D.  Cutaneous vasodilation 
E.  Diaphoresis
A

D. Cutaneous vasodilation

49
Q 
Shivering warms the body because it increases the rate of what?  
A.  Radiation 
B.  Conduction 
C.  ATP hydrolysis 
D.  Vasodilation 
E.  Glycolysis
A

C. ATP hydrolysis

50
Q

Which of the following results in heat exhaustion?
A. Extreme electrolyte loss via sweat
B. Denaturation of proteins in the brain tissue
C. Excessive heat loss from the body
D. A high rate of conduction and convection
E. A high humidity that retards evaporative cooling

A

A. Extreme electrolyte loss via sweat

51
Q 
Which of the following is not a major class of nutrients?  
A.  Water 
B.  Carbohydrates 
C.  Nucleic acids 
D.  Vitamins 
E.  Minerals
A

C. Nucleic acids

52
Q 
Three hours after your lunch and you are absorbing nutrients, which digestive phase are you in?  
A.  Postabsorptive state 
B.  Absorptive state 
C.  Gastric state 
D.  Vasoactive state
A

B. Absorptive state

53
Q

How is the basal metabolic rate (BMR) different from the total metabolic rate (TMR)?
A. The BMR includes the TMR.
B. The TMR includes the BMR.
C. The BMR is calculated when one is asleep.
D. The BMR includes energy expenditures for muscular contractions.

A

B. The TMR includes the BMR.

54
Q 
Which of the following is the primary source of body heat?  
A.  Nutrient oxidation 
B.  The sun 
C.  Conduction 
D.  Convection
A

A. Nutrient oxidation

55
Q

Which of the following is true regarding body temperature?
A. Oral temperature is a good way to estimate core temperature.
B. Adult oral temperature is typically 36.6 to 37.0C.
C. Body temperature is highest in the afternoon.
D. Organs in the spinal cavity are at the shell temperature.

A

B. Adult oral temperature is typically 36.6 to 37.0C

56
Q 
Where would you measure the shell temperature of a patient? 
A. Their skin
B. Their rectum
C. Their abdominal cavity
D. Their thoracic cavity
A

A. Their skin

BIO 160 (4 decks)

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